foo.cc: In function 'int main()':
foo.cc:9:22: error: 'x' was not declared in this scope
    9 |                 cin>>x;if(x>m)m=x;
      |                      ^
foo.cc:6:15: warning: unused variable 'c' [-Wunused-variable]
    6 |         int n,c,m=-99999;cin>>n;
      |               ^

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